I think more and more folks are holding off on the marriage thing, since so many relationships seems not to last and also more and more people will accept and compromise less in relationships..
I have been married once, and it lasted a few weeks.. lol (yeah i should have seen that coming.. but i was stubborn.)
Anyway, personally i think, i will know when the time is right and when the person is right for me, until then, i dont feel any need to be married.